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|
/*
* Copyright 2006-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/*!
* @file mxc_vpu.c
*
* @brief VPU system initialization and file operation implementation
*
* @ingroup VPU
*/
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/autoconf.h>
#include <linux/ioport.h>
#include <linux/stat.h>
#include <linux/platform_device.h>
#include <linux/kdev_t.h>
#include <linux/dma-mapping.h>
#include <linux/iram_alloc.h>
#include <linux/wait.h>
#include <linux/list.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/sizes.h>
#include <asm/dma-mapping.h>
#include <mach/hardware.h>
#include <mach/clock.h>
#include <mach/mxc_vpu.h>
struct vpu_priv {
struct fasync_struct *async_queue;
};
/* To track the allocated memory buffer */
typedef struct memalloc_record {
struct list_head list;
struct vpu_mem_desc mem;
} memalloc_record;
struct iram_setting {
u32 start;
u32 end;
};
static DEFINE_SPINLOCK(vpu_lock);
static LIST_HEAD(head);
static int vpu_major = 0;
static int vpu_clk_usercount;
static struct class *vpu_class;
static struct vpu_priv vpu_data;
static u8 open_count = 0;
static struct clk *vpu_clk;
static struct vpu_mem_desc bitwork_mem = { 0 };
static struct vpu_mem_desc pic_para_mem = { 0 };
static struct vpu_mem_desc user_data_mem = { 0 };
static struct vpu_mem_desc share_mem = { 0 };
static void __iomem *vpu_base;
static u32 phy_vpu_base_addr;
static struct mxc_vpu_platform_data *vpu_plat;
/* IRAM setting */
static struct iram_setting iram;
/* implement the blocking ioctl */
static int codec_done = 0;
static wait_queue_head_t vpu_queue;
static u32 workctrl_regsave[6];
static u32 rd_ptr_regsave[4];
static u32 wr_ptr_regsave[4];
static u32 dis_flag_regsave[4];
#define READ_REG(x) __raw_readl(vpu_base + x)
#define WRITE_REG(val, x) __raw_writel(val, vpu_base + x)
#define SAVE_WORK_REGS do { \
int i; \
for (i = 0; i < ARRAY_SIZE(workctrl_regsave)/2; i++) \
workctrl_regsave[i] = READ_REG(BIT_WORK_CTRL_BUF_REG(i));\
} while (0)
#define RESTORE_WORK_REGS do { \
int i; \
for (i = 0; i < ARRAY_SIZE(workctrl_regsave)/2; i++) \
WRITE_REG(workctrl_regsave[i], BIT_WORK_CTRL_BUF_REG(i));\
} while (0)
#define SAVE_CTRL_REGS do { \
int i; \
for (i = ARRAY_SIZE(workctrl_regsave)/2; \
i < ARRAY_SIZE(workctrl_regsave); i++) \
workctrl_regsave[i] = READ_REG(BIT_WORK_CTRL_BUF_REG(i));\
} while (0)
#define RESTORE_CTRL_REGS do { \
int i; \
for (i = ARRAY_SIZE(workctrl_regsave)/2; \
i < ARRAY_SIZE(workctrl_regsave); i++) \
WRITE_REG(workctrl_regsave[i], BIT_WORK_CTRL_BUF_REG(i));\
} while (0)
#define SAVE_RDWR_PTR_REGS do { \
int i; \
for (i = 0; i < ARRAY_SIZE(rd_ptr_regsave); i++) \
rd_ptr_regsave[i] = READ_REG(BIT_RD_PTR_REG(i)); \
for (i = 0; i < ARRAY_SIZE(wr_ptr_regsave); i++) \
wr_ptr_regsave[i] = READ_REG(BIT_WR_PTR_REG(i)); \
} while (0)
#define RESTORE_RDWR_PTR_REGS do { \
int i; \
for (i = 0; i < ARRAY_SIZE(rd_ptr_regsave); i++) \
WRITE_REG(rd_ptr_regsave[i], BIT_RD_PTR_REG(i)); \
for (i = 0; i < ARRAY_SIZE(wr_ptr_regsave); i++) \
WRITE_REG(wr_ptr_regsave[i], BIT_WR_PTR_REG(i)); \
} while (0)
#define SAVE_DIS_FLAG_REGS do { \
int i; \
for (i = 0; i < ARRAY_SIZE(dis_flag_regsave); i++) \
dis_flag_regsave[i] = READ_REG(BIT_FRM_DIS_FLG_REG(i)); \
} while (0)
#define RESTORE_DIS_FLAG_REGS do { \
int i; \
for (i = 0; i < ARRAY_SIZE(dis_flag_regsave); i++) \
WRITE_REG(dis_flag_regsave[i], BIT_FRM_DIS_FLG_REG(i)); \
} while (0)
/*!
* Private function to alloc dma buffer
* @return status 0 success.
*/
static int vpu_alloc_dma_buffer(struct vpu_mem_desc *mem)
{
mem->cpu_addr = (unsigned long)
dma_alloc_coherent(NULL, PAGE_ALIGN(mem->size),
(dma_addr_t *) (&mem->phy_addr),
GFP_DMA | GFP_KERNEL);
pr_debug("[ALLOC] mem alloc cpu_addr = 0x%x\n", mem->cpu_addr);
if ((void *)(mem->cpu_addr) == NULL) {
printk(KERN_ERR "Physical memory allocation error!\n");
return -1;
}
return 0;
}
/*!
* Private function to free dma buffer
*/
static void vpu_free_dma_buffer(struct vpu_mem_desc *mem)
{
if (mem->cpu_addr != 0) {
dma_free_coherent(0, PAGE_ALIGN(mem->size),
(void *)mem->cpu_addr, mem->phy_addr);
}
}
/*!
* Private function to free buffers
* @return status 0 success.
*/
static int vpu_free_buffers(void)
{
struct memalloc_record *rec, *n;
struct vpu_mem_desc mem;
list_for_each_entry_safe(rec, n, &head, list) {
mem = rec->mem;
if (mem.cpu_addr != 0) {
vpu_free_dma_buffer(&mem);
pr_debug("[FREE] freed paddr=0x%08X\n", mem.phy_addr);
/* delete from list */
list_del(&rec->list);
kfree(rec);
}
}
return 0;
}
/*!
* @brief vpu interrupt handler
*/
static irqreturn_t vpu_irq_handler(int irq, void *dev_id)
{
struct vpu_priv *dev = dev_id;
READ_REG(BIT_INT_STATUS);
WRITE_REG(0x1, BIT_INT_CLEAR);
if (dev->async_queue)
kill_fasync(&dev->async_queue, SIGIO, POLL_IN);
/*
* Clock is gated on when dec/enc started, gate it off when
* interrupt is received.
*/
clk_disable(vpu_clk);
codec_done = 1;
wake_up_interruptible(&vpu_queue);
return IRQ_HANDLED;
}
/*!
* @brief open function for vpu file operation
*
* @return 0 on success or negative error code on error
*/
static int vpu_open(struct inode *inode, struct file *filp)
{
spin_lock(&vpu_lock);
if ((open_count++ == 0) && cpu_is_mx32())
vl2cc_enable();
filp->private_data = (void *)(&vpu_data);
spin_unlock(&vpu_lock);
return 0;
}
/*!
* @brief IO ctrl function for vpu file operation
* @param cmd IO ctrl command
* @return 0 on success or negative error code on error
*/
static int vpu_ioctl(struct inode *inode, struct file *filp, u_int cmd,
u_long arg)
{
int ret = 0;
switch (cmd) {
case VPU_IOC_PHYMEM_ALLOC:
{
struct memalloc_record *rec;
rec = kzalloc(sizeof(*rec), GFP_KERNEL);
if (!rec)
return -ENOMEM;
ret = copy_from_user(&(rec->mem),
(struct vpu_mem_desc *)arg,
sizeof(struct vpu_mem_desc));
if (ret) {
kfree(rec);
return -EFAULT;
}
pr_debug("[ALLOC] mem alloc size = 0x%x\n",
rec->mem.size);
ret = vpu_alloc_dma_buffer(&(rec->mem));
if (ret == -1) {
kfree(rec);
printk(KERN_ERR
"Physical memory allocation error!\n");
break;
}
ret = copy_to_user((void __user *)arg, &(rec->mem),
sizeof(struct vpu_mem_desc));
if (ret) {
kfree(rec);
ret = -EFAULT;
break;
}
spin_lock(&vpu_lock);
list_add(&rec->list, &head);
spin_unlock(&vpu_lock);
break;
}
case VPU_IOC_PHYMEM_FREE:
{
struct memalloc_record *rec, *n;
struct vpu_mem_desc vpu_mem;
ret = copy_from_user(&vpu_mem,
(struct vpu_mem_desc *)arg,
sizeof(struct vpu_mem_desc));
if (ret)
return -EACCES;
pr_debug("[FREE] mem freed cpu_addr = 0x%x\n",
vpu_mem.cpu_addr);
if ((void *)vpu_mem.cpu_addr != NULL) {
vpu_free_dma_buffer(&vpu_mem);
}
spin_lock(&vpu_lock);
list_for_each_entry_safe(rec, n, &head, list) {
if (rec->mem.cpu_addr == vpu_mem.cpu_addr) {
/* delete from list */
list_del(&rec->list);
kfree(rec);
break;
}
}
spin_unlock(&vpu_lock);
break;
}
case VPU_IOC_WAIT4INT:
{
u_long timeout = (u_long) arg;
if (!wait_event_interruptible_timeout
(vpu_queue, codec_done != 0,
msecs_to_jiffies(timeout))) {
printk(KERN_WARNING "VPU blocking: timeout.\n");
ret = -ETIME;
} else if (signal_pending(current)) {
printk(KERN_WARNING
"VPU interrupt received.\n");
ret = -ERESTARTSYS;
} else
codec_done = 0;
break;
}
case VPU_IOC_VL2CC_FLUSH:
if (cpu_is_mx32()) {
vl2cc_flush();
}
break;
case VPU_IOC_IRAM_SETTING:
{
ret = copy_to_user((void __user *)arg, &iram,
sizeof(struct iram_setting));
if (ret)
ret = -EFAULT;
break;
}
case VPU_IOC_CLKGATE_SETTING:
{
u32 clkgate_en;
if (get_user(clkgate_en, (u32 __user *) arg))
return -EFAULT;
if (clkgate_en) {
clk_enable(vpu_clk);
} else {
clk_disable(vpu_clk);
}
break;
}
case VPU_IOC_GET_SHARE_MEM:
{
spin_lock(&vpu_lock);
if (share_mem.cpu_addr != 0) {
ret = copy_to_user((void __user *)arg,
&share_mem,
sizeof(struct vpu_mem_desc));
spin_unlock(&vpu_lock);
break;
} else {
if (copy_from_user(&share_mem,
(struct vpu_mem_desc *)arg,
sizeof(struct vpu_mem_desc))) {
spin_unlock(&vpu_lock);
return -EFAULT;
}
if (vpu_alloc_dma_buffer(&share_mem) == -1)
ret = -EFAULT;
else {
if (copy_to_user((void __user *)arg,
&share_mem,
sizeof(struct
vpu_mem_desc)))
ret = -EFAULT;
}
}
spin_unlock(&vpu_lock);
break;
}
case VPU_IOC_GET_WORK_ADDR:
{
if (bitwork_mem.cpu_addr != 0) {
ret =
copy_to_user((void __user *)arg,
&bitwork_mem,
sizeof(struct vpu_mem_desc));
break;
} else {
if (copy_from_user(&bitwork_mem,
(struct vpu_mem_desc *)arg,
sizeof(struct vpu_mem_desc)))
return -EFAULT;
if (vpu_alloc_dma_buffer(&bitwork_mem) == -1)
ret = -EFAULT;
else if (copy_to_user((void __user *)arg,
&bitwork_mem,
sizeof(struct
vpu_mem_desc)))
ret = -EFAULT;
}
break;
}
case VPU_IOC_GET_PIC_PARA_ADDR:
{
if (pic_para_mem.cpu_addr != 0) {
ret =
copy_to_user((void __user *)arg,
&pic_para_mem,
sizeof(struct vpu_mem_desc));
break;
} else {
if (copy_from_user(&pic_para_mem,
(struct vpu_mem_desc *)arg,
sizeof(struct vpu_mem_desc)))
return -EFAULT;
if (vpu_alloc_dma_buffer(&pic_para_mem) == -1)
ret = -EFAULT;
else if (copy_to_user((void __user *)arg,
&pic_para_mem,
sizeof(struct
vpu_mem_desc)))
ret = -EFAULT;
}
break;
}
case VPU_IOC_GET_USER_DATA_ADDR:
{
if (user_data_mem.cpu_addr != 0) {
ret =
copy_to_user((void __user *)arg,
&user_data_mem,
sizeof(struct vpu_mem_desc));
break;
} else {
if (copy_from_user(&user_data_mem,
(struct vpu_mem_desc *)arg,
sizeof(struct vpu_mem_desc)))
return -EFAULT;
if (vpu_alloc_dma_buffer(&user_data_mem) == -1)
ret = -EFAULT;
else if (copy_to_user((void __user *)arg,
&user_data_mem,
sizeof(struct
vpu_mem_desc)))
ret = -EFAULT;
}
break;
}
case VPU_IOC_SYS_SW_RESET:
{
if (vpu_plat->reset)
vpu_plat->reset();
break;
}
case VPU_IOC_REG_DUMP:
break;
case VPU_IOC_PHYMEM_DUMP:
break;
default:
{
printk(KERN_ERR "No such IOCTL, cmd is %d\n", cmd);
break;
}
}
return ret;
}
/*!
* @brief Release function for vpu file operation
* @return 0 on success or negative error code on error
*/
static int vpu_release(struct inode *inode, struct file *filp)
{
spin_lock(&vpu_lock);
if (open_count > 0 && !(--open_count)) {
vpu_free_buffers();
if (cpu_is_mx32())
vl2cc_disable();
/* Free shared memory when vpu device is idle */
vpu_free_dma_buffer(&share_mem);
share_mem.cpu_addr = 0;
}
spin_unlock(&vpu_lock);
return 0;
}
/*!
* @brief fasync function for vpu file operation
* @return 0 on success or negative error code on error
*/
static int vpu_fasync(int fd, struct file *filp, int mode)
{
struct vpu_priv *dev = (struct vpu_priv *)filp->private_data;
return fasync_helper(fd, filp, mode, &dev->async_queue);
}
/*!
* @brief memory map function of harware registers for vpu file operation
* @return 0 on success or negative error code on error
*/
static int vpu_map_hwregs(struct file *fp, struct vm_area_struct *vm)
{
unsigned long pfn;
vm->vm_flags |= VM_IO | VM_RESERVED;
vm->vm_page_prot = pgprot_noncached(vm->vm_page_prot);
pfn = phy_vpu_base_addr >> PAGE_SHIFT;
pr_debug("size=0x%x, page no.=0x%x\n",
(int)(vm->vm_end - vm->vm_start), (int)pfn);
return remap_pfn_range(vm, vm->vm_start, pfn, vm->vm_end - vm->vm_start,
vm->vm_page_prot) ? -EAGAIN : 0;
}
/*!
* @brief memory map function of memory for vpu file operation
* @return 0 on success or negative error code on error
*/
static int vpu_map_mem(struct file *fp, struct vm_area_struct *vm)
{
int request_size;
request_size = vm->vm_end - vm->vm_start;
pr_debug(" start=0x%x, pgoff=0x%x, size=0x%x\n",
(unsigned int)(vm->vm_start), (unsigned int)(vm->vm_pgoff),
request_size);
vm->vm_flags |= VM_IO | VM_RESERVED;
vm->vm_page_prot = pgprot_noncached(vm->vm_page_prot);
return remap_pfn_range(vm, vm->vm_start, vm->vm_pgoff,
request_size, vm->vm_page_prot) ? -EAGAIN : 0;
}
/*!
* @brief memory map interface for vpu file operation
* @return 0 on success or negative error code on error
*/
static int vpu_mmap(struct file *fp, struct vm_area_struct *vm)
{
if (vm->vm_pgoff)
return vpu_map_mem(fp, vm);
else
return vpu_map_hwregs(fp, vm);
}
struct file_operations vpu_fops = {
.owner = THIS_MODULE,
.open = vpu_open,
.ioctl = vpu_ioctl,
.release = vpu_release,
.fasync = vpu_fasync,
.mmap = vpu_mmap,
};
/*!
* This function is called by the driver framework to initialize the vpu device.
* @param dev The device structure for the vpu passed in by the framework.
* @return 0 on success or negative error code on error
*/
static int vpu_dev_probe(struct platform_device *pdev)
{
int err = 0;
struct device *temp_class;
struct resource *res;
unsigned long addr = 0;
vpu_plat = pdev->dev.platform_data;
iram_alloc(VPU_IRAM_SIZE, &addr);
if (addr == 0)
iram.start = iram.end = 0;
else {
iram.start = addr;
iram.end = addr + VPU_IRAM_SIZE - 1;
}
if (cpu_is_mx32()) {
err = vl2cc_init(iram.start);
if (err != 0)
return err;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
printk(KERN_ERR "vpu: unable to get vpu base addr\n");
return -ENODEV;
}
phy_vpu_base_addr = res->start;
vpu_base = ioremap(res->start, res->end - res->start);
vpu_major = register_chrdev(vpu_major, "mxc_vpu", &vpu_fops);
if (vpu_major < 0) {
printk(KERN_ERR "vpu: unable to get a major for VPU\n");
err = -EBUSY;
goto error;
}
vpu_class = class_create(THIS_MODULE, "mxc_vpu");
if (IS_ERR(vpu_class)) {
err = PTR_ERR(vpu_class);
goto err_out_chrdev;
}
temp_class = device_create(vpu_class, NULL, MKDEV(vpu_major, 0),
NULL, "mxc_vpu");
if (IS_ERR(temp_class)) {
err = PTR_ERR(temp_class);
goto err_out_class;
}
vpu_clk = clk_get(&pdev->dev, "vpu_clk");
if (IS_ERR(vpu_clk)) {
err = -ENOENT;
goto err_out_class;
}
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
printk(KERN_ERR "vpu: unable to get vpu interrupt\n");
err = -ENXIO;
goto err_out_class;
}
err = request_irq(res->start, vpu_irq_handler, 0, "VPU_CODEC_IRQ",
(void *)(&vpu_data));
if (err)
goto err_out_class;
printk(KERN_INFO "VPU initialized\n");
goto out;
err_out_class:
device_destroy(vpu_class, MKDEV(vpu_major, 0));
class_destroy(vpu_class);
err_out_chrdev:
unregister_chrdev(vpu_major, "mxc_vpu");
error:
iounmap(vpu_base);
if (cpu_is_mx32()) {
vl2cc_cleanup();
}
out:
return err;
}
static int vpu_dev_remove(struct platform_device *pdev)
{
iounmap(vpu_base);
iram_free(iram.start, VPU_IRAM_SIZE);
return 0;
}
#ifdef CONFIG_PM
static int vpu_suspend(struct platform_device *pdev, pm_message_t state)
{
int i;
unsigned long timeout;
/* Wait for vpu go to idle state, suspect vpu cannot be changed
to idle state after about 1 sec */
if (open_count > 0) {
timeout = jiffies + HZ;
clk_enable(vpu_clk);
while (READ_REG(BIT_BUSY_FLAG)) {
msleep(1);
if (time_after(jiffies, timeout))
goto out;
}
clk_disable(vpu_clk);
}
/* Make sure clock is disabled before suspend */
vpu_clk_usercount = clk_get_usecount(vpu_clk);
for (i = 0; i < vpu_clk_usercount; i++)
clk_disable(vpu_clk);
if (!cpu_is_mx53()) {
clk_enable(vpu_clk);
if (bitwork_mem.cpu_addr != 0) {
SAVE_WORK_REGS;
SAVE_CTRL_REGS;
SAVE_RDWR_PTR_REGS;
SAVE_DIS_FLAG_REGS;
WRITE_REG(0x1, BIT_BUSY_FLAG);
WRITE_REG(VPU_SLEEP_REG_VALUE, BIT_RUN_COMMAND);
while (READ_REG(BIT_BUSY_FLAG))
;
}
clk_disable(vpu_clk);
}
if (cpu_is_mx37() || cpu_is_mx51())
mxc_pg_enable(pdev);
return 0;
out:
clk_disable(vpu_clk);
return -EAGAIN;
}
static int vpu_resume(struct platform_device *pdev)
{
int i;
if (cpu_is_mx37() || cpu_is_mx51())
mxc_pg_disable(pdev);
if (cpu_is_mx53())
goto recover_clk;
clk_enable(vpu_clk);
if (bitwork_mem.cpu_addr != 0) {
u32 *p = (u32 *) bitwork_mem.cpu_addr;
u32 data;
u16 data_hi;
u16 data_lo;
RESTORE_WORK_REGS;
WRITE_REG(0x0, BIT_RESET_CTRL);
WRITE_REG(0x0, BIT_CODE_RUN);
/*
* Re-load boot code, from the codebuffer in external RAM.
* Thankfully, we only need 4096 bytes, same for all platforms.
*/
if (cpu_is_mx51()) {
for (i = 0; i < 2048; i += 4) {
data = p[(i / 2) + 1];
data_hi = (data >> 16) & 0xFFFF;
data_lo = data & 0xFFFF;
WRITE_REG((i << 16) | data_hi, BIT_CODE_DOWN);
WRITE_REG(((i + 1) << 16) | data_lo,
BIT_CODE_DOWN);
data = p[i / 2];
data_hi = (data >> 16) & 0xFFFF;
data_lo = data & 0xFFFF;
WRITE_REG(((i + 2) << 16) | data_hi,
BIT_CODE_DOWN);
WRITE_REG(((i + 3) << 16) | data_lo,
BIT_CODE_DOWN);
}
} else {
for (i = 0; i < 2048; i += 2) {
if (cpu_is_mx37())
data = swab32(p[i / 2]);
else
data = p[i / 2];
data_hi = (data >> 16) & 0xFFFF;
data_lo = data & 0xFFFF;
WRITE_REG((i << 16) | data_hi, BIT_CODE_DOWN);
WRITE_REG(((i + 1) << 16) | data_lo,
BIT_CODE_DOWN);
}
}
RESTORE_CTRL_REGS;
WRITE_REG(BITVAL_PIC_RUN, BIT_INT_ENABLE);
WRITE_REG(0x1, BIT_BUSY_FLAG);
WRITE_REG(0x1, BIT_CODE_RUN);
while (READ_REG(BIT_BUSY_FLAG)) ;
RESTORE_RDWR_PTR_REGS;
RESTORE_DIS_FLAG_REGS;
WRITE_REG(0x1, BIT_BUSY_FLAG);
WRITE_REG(VPU_WAKE_REG_VALUE, BIT_RUN_COMMAND);
while (READ_REG(BIT_BUSY_FLAG)) ;
}
clk_disable(vpu_clk);
recover_clk:
/* Recover vpu clock */
for (i = 0; i < vpu_clk_usercount; i++)
clk_enable(vpu_clk);
return 0;
}
#else
#define vpu_suspend NULL
#define vpu_resume NULL
#endif /* !CONFIG_PM */
/*! Driver definition
*
*/
static struct platform_driver mxcvpu_driver = {
.driver = {
.name = "mxc_vpu",
},
.probe = vpu_dev_probe,
.remove = vpu_dev_remove,
.suspend = vpu_suspend,
.resume = vpu_resume,
};
static int __init vpu_init(void)
{
int ret = platform_driver_register(&mxcvpu_driver);
init_waitqueue_head(&vpu_queue);
return ret;
}
static void __exit vpu_exit(void)
{
free_irq(MXC_INT_VPU, (void *)(&vpu_data));
if (vpu_major > 0) {
device_destroy(vpu_class, MKDEV(vpu_major, 0));
class_destroy(vpu_class);
unregister_chrdev(vpu_major, "mxc_vpu");
vpu_major = 0;
}
if (cpu_is_mx32()) {
vl2cc_cleanup();
}
vpu_free_dma_buffer(&bitwork_mem);
vpu_free_dma_buffer(&pic_para_mem);
vpu_free_dma_buffer(&user_data_mem);
clk_put(vpu_clk);
platform_driver_unregister(&mxcvpu_driver);
return;
}
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("Linux VPU driver for Freescale i.MX/MXC");
MODULE_LICENSE("GPL");
module_init(vpu_init);
module_exit(vpu_exit);
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